Wenninger
blade for cutoff devices in tobacco processing
machines and method op making the same

ABSTRACT

THE BLADE OF A CUTOFF DEVICE OR SEVERING DEVICE FOR WRAPPED TOBACCO OR FILTER RODS, PARTICULARLY FOR SEVERTING OF FILTER RODS, IS A ONE-PIECE BODY CONSISTING OF CHROMIUM STEEL OR ANOTHER STEEL ALLOY AND HAVING A RELATIVELY HARD LAYER AND ONE OR TWO SOFTER OUTER LAYERS. THE HARD LAYER HAS A SHARPLY DEFINED WEDGE-SHAPED CUTTING EDGE WHICH EXTENDS BEYOND THE SOFTER LAYER OR LAYERS. THE IMPARTING OF DIFFERENT HARDNESSES TO THE LAYERS. THE IMPARTING CARRIED OUT IN A VACUUM FURNACE BY CHANGING THE TEXTURE OF THE MATERIAL OF A STEEL BLANK. THE SOFTER OUTER LAYER OR LAYERS REDUCE THE LIKELIHOOD OF BREAKAGE OR CRACKING AND ENHANCE THE ELASTICITY OF THE BLADE. A SICKLE-SHAPED BLADE IS PREFERRED FOR USE IN CUTOFF DEVICES WHICH SERVE TO SEVER WRAPPED TOBACCO OR FILTER RODS WHILE THE RODS MOVE AXIALLY, AND A DISK-SHAPED BLADE IS PREFERRED FOR SERVERING OF WRAPPED TOBACCO OR FILTER RODS WHICH MOVE SIDEWAYS. THE BLADE CAN BE USED FOR EXTENDED PERIODS OF TIME WITHOUT ANY SHARPENING OR WITH GRINDING AT INFREQUENT INTERVALS.

DEEENSWE U LlEATiN UNITED STATES PATENT OFFICE Published at the requestof the applicant or owner in accordance with the Notice of Dec. 16,1969, 869 O.G. 687. The abstracts of Defensive Publication applicationsare identified by distinctly numbered series and are arrangedchronologically. The heading of each abstract indicates the number ofpages of specification, including claims and sheets of drawingscontained in the application as originally filed The files of theseapplications are available to the public for inspection and reproductionmay be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Otfice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED DECEMBER l l, 1971 T893,006 BLADE FOR CUTOFF DEVICES 1NTOBACCO PROCESSING MACHllNES AND METHOD OF MAKING THE SAME FritzWenninger, Mechanicsville, Va., assignor to Hanni- Werke Korber & Co.KG, Hamburg, Germany Filed Dec. 3, 1970, Ser. No. 94,789 Int. Cl. B26d1/12 US. Cl. 83-663 2 Sheets Drawing. 17 Pages Specification The bladeof a cutoif device or severing device for wrapped tobacco or filterrods, particularly for severing of filter rods, is a one-piece bodyconsisting of chromium steel or another steel alloy and having arelatively hard layer and one or two softer outer layers. The hard layerhas a sharply defined wedge-shaped cutting edge which extends beyond thesofter layer or layers. The imparting of different hardnesses to thelayers of the blade can be carried out in a vacuum furnace by changingthe texture of the material of a steel blank. The softer outer layer orlayers reduce the likelihood of breakage or cracking and enhance theelasticity of the blade. A sickle-shaped blade is preferred for use incutoff devices which serve to sever wrapped tobacco or filter rods whilethe rods move axially, and a disk-shaped blade is preferred for severingof wrapped tobacco or filter rods Which move sideways. The blade can beused for extended periods of time without any sharpening or withgrinding at infrequent intervals.

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